diff options
Diffstat (limited to 'drivers/scsi/be2iscsi/be.h')
| -rw-r--r-- | drivers/scsi/be2iscsi/be.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/scsi/be2iscsi/be.h b/drivers/scsi/be2iscsi/be.h new file mode 100644 index 000000000..4c58a0259 --- /dev/null +++ b/drivers/scsi/be2iscsi/be.h @@ -0,0 +1,205 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright 2017 Broadcom. All Rights Reserved. + * The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries. + * + * Contact Information: + * linux-drivers@broadcom.com + */ + +#ifndef BEISCSI_H +#define BEISCSI_H + +#include <linux/pci.h> +#include <linux/if_vlan.h> +#include <linux/irq_poll.h> +#define FW_VER_LEN 32 +#define MCC_Q_LEN 128 +#define MCC_CQ_LEN 256 +#define MAX_MCC_CMD 16 +/* BladeEngine Generation numbers */ +#define BE_GEN2 2 +#define BE_GEN3 3 +#define BE_GEN4 4 +struct be_dma_mem { + void *va; + dma_addr_t dma; + u32 size; +}; + +struct be_queue_info { + struct be_dma_mem dma_mem; + u16 len; + u16 entry_size; /* Size of an element in the queue */ + u16 id; + u16 tail, head; + bool created; + u16 used; /* Number of valid elements in the queue */ +}; + +static inline u32 MODULO(u16 val, u16 limit) +{ + WARN_ON(limit & (limit - 1)); + return val & (limit - 1); +} + +static inline void index_inc(u16 *index, u16 limit) +{ + *index = MODULO((*index + 1), limit); +} + +static inline void *queue_head_node(struct be_queue_info *q) +{ + return q->dma_mem.va + q->head * q->entry_size; +} + +static inline void *queue_get_wrb(struct be_queue_info *q, unsigned int wrb_num) +{ + return q->dma_mem.va + wrb_num * q->entry_size; +} + +static inline void *queue_tail_node(struct be_queue_info *q) +{ + return q->dma_mem.va + q->tail * q->entry_size; +} + +static inline void queue_head_inc(struct be_queue_info *q) +{ + index_inc(&q->head, q->len); +} + +static inline void queue_tail_inc(struct be_queue_info *q) +{ + index_inc(&q->tail, q->len); +} + +/*ISCSI */ + +struct be_aic_obj { /* Adaptive interrupt coalescing (AIC) info */ + unsigned long jiffies; + u32 eq_prev; /* Used to calculate eqe */ + u32 prev_eqd; +#define BEISCSI_EQ_DELAY_MIN 0 +#define BEISCSI_EQ_DELAY_DEF 32 +#define BEISCSI_EQ_DELAY_MAX 128 +}; + +struct be_eq_obj { + u32 cq_count; + struct be_queue_info q; + struct beiscsi_hba *phba; + struct be_queue_info *cq; + struct work_struct mcc_work; /* Work Item */ + struct irq_poll iopoll; +}; + +struct be_mcc_obj { + struct be_queue_info q; + struct be_queue_info cq; +}; + +struct beiscsi_mcc_tag_state { + unsigned long tag_state; +#define MCC_TAG_STATE_RUNNING 0 +#define MCC_TAG_STATE_TIMEOUT 1 +#define MCC_TAG_STATE_ASYNC 2 +#define MCC_TAG_STATE_IGNORE 3 + void (*cbfn)(struct beiscsi_hba *, unsigned int); + struct be_dma_mem tag_mem_state; +}; + +struct be_ctrl_info { + u8 __iomem *csr; + u8 __iomem *db; /* Door Bell */ + u8 __iomem *pcicfg; /* PCI config space */ + struct pci_dev *pdev; + + /* Mbox used for cmd request/response */ + struct mutex mbox_lock; /* For serializing mbox cmds to BE card */ + struct be_dma_mem mbox_mem; + /* Mbox mem is adjusted to align to 16 bytes. The allocated addr + * is stored for freeing purpose */ + struct be_dma_mem mbox_mem_alloced; + + /* MCC Rings */ + struct be_mcc_obj mcc_obj; + spinlock_t mcc_lock; /* For serializing mcc cmds to BE card */ + + wait_queue_head_t mcc_wait[MAX_MCC_CMD + 1]; + unsigned int mcc_tag[MAX_MCC_CMD]; + unsigned int mcc_tag_status[MAX_MCC_CMD + 1]; + unsigned short mcc_alloc_index; + unsigned short mcc_free_index; + unsigned int mcc_tag_available; + + struct beiscsi_mcc_tag_state ptag_state[MAX_MCC_CMD + 1]; +}; + +#include "be_cmds.h" + +/* WRB index mask for MCC_Q_LEN queue entries */ +#define MCC_Q_WRB_IDX_MASK CQE_STATUS_WRB_MASK +#define MCC_Q_WRB_IDX_SHIFT CQE_STATUS_WRB_SHIFT +/* TAG is from 1...MAX_MCC_CMD, MASK includes MAX_MCC_CMD */ +#define MCC_Q_CMD_TAG_MASK ((MAX_MCC_CMD << 1) - 1) + +#define PAGE_SHIFT_4K 12 +#define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K) + +/* Returns number of pages spanned by the data starting at the given addr */ +#define PAGES_4K_SPANNED(_address, size) \ + ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) + \ + (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K)) + +/* Returns bit offset within a DWORD of a bitfield */ +#define AMAP_BIT_OFFSET(_struct, field) \ + (((size_t)&(((_struct *)0)->field))%32) + +/* Returns the bit mask of the field that is NOT shifted into location. */ +static inline u32 amap_mask(u32 bitsize) +{ + return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1); +} + +static inline void amap_set(void *ptr, u32 dw_offset, u32 mask, + u32 offset, u32 value) +{ + u32 *dw = (u32 *) ptr + dw_offset; + *dw &= ~(mask << offset); + *dw |= (mask & value) << offset; +} + +#define AMAP_SET_BITS(_struct, field, ptr, val) \ + amap_set(ptr, \ + offsetof(_struct, field)/32, \ + amap_mask(sizeof(((_struct *)0)->field)), \ + AMAP_BIT_OFFSET(_struct, field), \ + val) + +static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset) +{ + u32 *dw = ptr; + return mask & (*(dw + dw_offset) >> offset); +} + +#define AMAP_GET_BITS(_struct, field, ptr) \ + amap_get(ptr, \ + offsetof(_struct, field)/32, \ + amap_mask(sizeof(((_struct *)0)->field)), \ + AMAP_BIT_OFFSET(_struct, field)) + +#define be_dws_cpu_to_le(wrb, len) swap_dws(wrb, len) +#define be_dws_le_to_cpu(wrb, len) swap_dws(wrb, len) +static inline void swap_dws(void *wrb, int len) +{ +#ifdef __BIG_ENDIAN + u32 *dw = wrb; + WARN_ON(len % 4); + do { + *dw = cpu_to_le32(*dw); + dw++; + len -= 4; + } while (len); +#endif /* __BIG_ENDIAN */ +} +#endif /* BEISCSI_H */ |